Description
A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | glibc | 2.36-3 | — |
| Debian 13 | glibc | 2.36-3 | — |
| Debian 12 | glibc | 2.36-3 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | glibc | 2.35-0ubuntu3.5 | USN-6541-1 |
| Ubuntu 20.04 LTS | glibc | 2.31-0ubuntu9.14 | USN-6541-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | glibc | 2.27-3ubuntu1.6+esm1 | USN-6541-1 |
| Ubuntu Pro 16.04 LTS | glibc | 2.23-0ubuntu11.3+esm5 | USN-6541-1 |
| Ubuntu Pro 14.04 LTS | eglibc | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | nscd +214 | 2.34-60.el9_2.7 | RHSA-2023:5453, RHBA-2024:2413 |
| RHEL 8 | nscd +213 | 2.28-225.el8_8.6 | RHSA-2023:5455 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | glibc-devel +1 | 2.28-189.8.el8_6 | RHSA-2023:7409 |
| RHEL 8.6 EUS | nscd +213 | 2.28-189.8.el8_6 | RHSA-2023:7409 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | nscd +214 | 2.34-60.el9_2.7 | ALSA-2023:5453 |
| AlmaLinux 8 | nscd +213 | 2.28-225.el8_8.6 | ALSA-2023:5455 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | glibc | 2.28-225.el8_8.6 | RLSA-2023:5455 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SLES 15 SP4 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SLES 15 SP3 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SLES 15 SP2 | glibc | 2.26-150000.13.70.1 | SUSE-SU-2023:4047-1 |
| SLES 15 SP1 | glibc | 2.26-150000.13.70.1 | SUSE-SU-2023:4047-1 |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | glibc | 2.22-114.31.1 | SUSE-RU-2023:4063-1 |
| SLES for SAP 15 SP3 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SLES for SAP 15 SP2 | glibc | 2.26-150000.13.70.1 | SUSE-SU-2023:4047-1 |
| SLES for SAP 15 SP1 | glibc | 2.26-150000.13.70.1 | SUSE-SU-2023:4047-1 |
| SLES for SAP 12 SP5 | glibc | 2.22-114.31.1 | SUSE-RU-2023:4063-1 |
| SLE Micro 5.5 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SLE Micro 5.4 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SLE Micro 5.3 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SLE Micro 5.2 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SLE Micro 5.1 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SLE HPC 15 SP3 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SLE HPC 15 SP2 | glibc | 2.26-150000.13.70.1 | SUSE-SU-2023:4047-1 |
| SLE HPC 15 SP1 | glibc | 2.26-150000.13.70.1 | SUSE-SU-2023:4047-1 |
| SUSE Manager Server 4.2 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SUSE Manager Proxy 4.2 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
| SUSE Enterprise Storage 7.1 | glibc | 2.31-150300.63.1 | SUSE-SU-2023:4110-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.38-6.1 | openSUSE-SU-2024:13388-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | nscd +217 | 2.34-52.amzn2023.0.6 | ALAS2023-2023-359 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | glibc | 2.35-7 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | nscd +214 | 2.34-60.0.3.el9_2.7 | ELSA-2023-5453 |
| Oracle Linux 8 | nscd +213 | 2.28-225.0.4.el8_8.6 | ELSA-2023-5455 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
tnishiox/cve-2023-4813 ★ 2 · Jun 6, 2024
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 18
- ALSA-2023:5453 Important: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:5455 Important: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- RHBA-2024:2413 Red Hat Bug Fix Advisory: glibc bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 18, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- RHSA-2023:7409 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2023:5455 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2023:5453 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- USN-6541-1 glibc vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- RLSA-2023:5455 Important: glibc security update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2024:13388-1 glibc-2.38-6.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-RU-2023:4063-1 Recommended update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4047-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4110-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- WID-SEC-2023-2314 GNU libc: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jul 3, 2024
- ELSA-2023-5455 Important: glibc security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Dec 19, 2023
- ELSA-2023-5453 Important: glibc security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 10, 2023
- ALAS2023-2023-359 Important: glibc security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 3, 2023
References
- RHSA-2023:5453 vendor-advisory
- RHSA-2023:5455 vendor-advisory
- RHSA-2023:7409 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2023-4813 vdb-entry
- RHBZ#2237798 issue-tracking